The shelves (pieces 3) are made by edge gluing several boards together. Make the shelves slightly oversize in width and length so they can be cut to their finished dimensions of 11" by 40" after the glue dries. Using two or three boards per shelf, alternating their end grain growth rings, will significantly reduce the chance of warping. Try choosing boards with matching grain patterns and color. Edge gluing alone is sufficient to make strong shelves, although you could use dowels, splines, or biscuits in the joints to help keep the boards aligned during the clamping process.

Once the glue has cured, cut the shelves to their finished dimensions. Now cut the posts (pieces 1) and the slats (pieces 2 and 4) to their finished dimensions. Make the screw hole plugs (pieces 5) from scrap cherry with a 3/8" plug cutter chucked in your drill press. Now you're ready to cut the dadoes in the posts and center slats for supporting the shelves, and to form the pyramid on the top end of each post and slat.